0047ecaa6ea3e9ac0a13a2fe96f4de3bfd515c88f5d90c1fae79b956363d7f02c7fa060269

Dec 1, 20090 likes1,255 views

This document appears to be a weekly update from an intro to computer science course. It includes summaries of classmates' demographics, comfort levels, and prior experience. It also discusses time spent on problem sets and recommends upcoming courses in CS51 and CS61. Finally, it recommends reading on topics like TCP/IP, HTTP, XHTML, CSS, PHP, SQL and using bulletin boards, and includes images related to these topics.

Computer Science 50
Introduction to Computer Science I

Harvard College

Week 10

David J. Malan
malan@post.harvard.edu

0

Your Classmates by Gender
Female 29% 79
Male 71% 194

2

Oh, the Places You’ll Go!
CS 51: Introduction to Computer Science II
sneak preview on Friday, 7 December 2007
Abstraction and design in computation. Topics include: Functional and object-
oriented styles of programming; software engineering in the small; implementation of
a language interpreter. Goal: understanding how to design large programs to make
them readable, maintainable, efficient, and elegant. Exercises in LISP (Scheme)
and C++.

CS 61: Systems Programming and Machine Organization
sneak preview on Monday, 10 December 2007
Fundamentals of computer systems programming, machine organization, and
performance tuning. This course provides a solid background in systems
programming and a deep understanding of low-level machine organization and
design. Topics include C and assembly language programming, program
optimization, memory hierarchy and caching, virtual memory and dynamic memory
management, concurrency, threads, and synchronization.

6

TFs
Graders
Coders

Image from http://members.memlane.com/gromboug/P16MvSig.htm.
7

Recommended Reading
TCP/IP Tutorial
http://www.w3schools.com/tcpip/
How Web Servers Work
http://computer.howstuffworks.com/web-server.htm
XHTML Tutorial
http://www.w3schools.com/xhtml/
CSS Tutorial
http://www.w3schools.com/css/
PHP Tutorial
http://www.w3schools.com/php/
SQL Tutorial
http://www.w3schools.com/sql/

9

“RTFM”
PHP Manual
http://us.php.net/manual/en/
MySQL 5.0 Reference Manual
http://dev.mysql.com/doc/refman/5.0/en/

10

TCP/IP

Image from http://www.belkin.com/support/download/files/F5D7231-4.pdf. 12

HTTP

Image from http://computer.howstuffworks.com/web-server1.htm. 13

XHTML
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>hello, world</title>
</head>
<body>
hello, world
</body>
</html>

14

CSS
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link href="styles.css" rel="stylesheet" type="text/css" />
<title>hello, world</title>
</head>
<body>
hello, world
</body>
</html>

15

Validation

http://validator.w3.org/

16

Forms
Text Fields
<input name="email" type="text" />
Password Fields
<input name="password" type="password" />
Checkboxes
<input name="save" type="checkbox" />
Radio Buttons
<input name="gender" type="radio" value="F" />
<input name="gender" type="radio" value="M" />
Drop-Down Menus
<select name="dorm">
<option value=""></option>
<option value="Matthews"></option>
<option value="Weld"></option>
</select>

17

Mispellings

$dictionary[$word] = TRUE;

18

Some Predefined Variables
$_GET
$_POST

19

Computer Science 50
Introduction to Computer Science I

Harvard College

Week 10

David J. Malan
malan@post.harvard.edu

21

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Building 10x Organizations with Modern Productivity Metrics 10x developers may be a myth, but 10x organizations are very real, as proven by the influential study performed in the 1980s, ‘The Coding War Games.’ Right now, here in early 2025, we seem to be experiencing YAPP (Yet Another Productivity Philosophy), and that philosophy is converging on developer experience. It seems that with every new method we invent for the delivery of products, whether physical or virtual, we reinvent productivity philosophies to go alongside them. But which of these approaches actually work? DORA? SPACE? DevEx? What should we invest in and create urgency behind today, so that we don’t find ourselves having the same discussion again in a decade?

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Talk at the final event of Data Fusion Dynamics: A Collaborative UK-Saudi Initiative in Cybersecurity and Artificial Intelligence funded by the British Council UK-Saudi Challenge Fund 2024, Cardiff Metropolitan University, 29th April 2025 https://alandix.com/academic/talks/CMet2025-AI-Changes-Everything/ Is AI just another technology, or does it fundamentally change the way we live and think? Every technology has a direct impact with micro-ethical consequences, some good, some bad. However more profound are the ways in which some technologies reshape the very fabric of society with macro-ethical impacts. The invention of the stirrup revolutionised mounted combat, but as a side effect gave rise to the feudal system, which still shapes politics today. The internal combustion engine offers personal freedom and creates pollution, but has also transformed the nature of urban planning and international trade. When we look at AI the micro-ethical issues, such as bias, are most obvious, but the macro-ethical challenges may be greater. At a micro-ethical level AI has the potential to deepen social, ethnic and gender bias, issues I have warned about since the early 1990s! It is also being used increasingly on the battlefield. However, it also offers amazing opportunities in health and educations, as the recent Nobel prizes for the developers of AlphaFold illustrate. More radically, the need to encode ethics acts as a mirror to surface essential ethical problems and conflicts. At the macro-ethical level, by the early 2000s digital technology had already begun to undermine sovereignty (e.g. gambling), market economics (through network effects and emergent monopolies), and the very meaning of money. Modern AI is the child of big data, big computation and ultimately big business, intensifying the inherent tendency of digital technology to concentrate power. AI is already unravelling the fundamentals of the social, political and economic world around us, but this is a world that needs radical reimagining to overcome the global environmental and human challenges that confront us. Our challenge is whether to let the threads fall as they may, or to use them to weave a better future.

Procurement Insights Cost To Value Guide.pptxJon Hansen